PSG surprises everyone in the just concluded UEFA Champions League competition, and they can compete in the next UEFA Champions League competition that will start in a few months from now, but I doubt if PSG can make it to the final because the UEFA Champions League is a tough and difficult competition, and a lot of clubs will rise against PSG when the competition starts.
It was no longer a surprise after they managed to knock out Liverpool, what was surprising was how they managed to win in final match with a high score and even managed to keep a clean sheet.
Of the 24 teams that have ever won the Champions League, only a few teams have been able to repeat their success in the following season, the rest they only did it once or occasionally, even after becoming champions it took a long time to lift the trophy again, so it doesn't matter if they fail in the next season, because defending the title is indeed more difficult.